Same Problem

Got mine from CompUSA / TigerDirect -
Returned it - Paid return shipping
Got a new one...
Same problem...

Plug headphones in, Leave them in - walk away from PC, it goes to sleep
Come back - log in
Chime from windows (ie sound) can be heard from the laptop speakers - loud too...
But the Headphones are still plugged in...
Updated audio driver -

Re-imaged (using recovery DVDs)
Would be nice for BIOS update or firmware or sound drivers to be fixed...

Yes, I tried using multiple headphones..
Yes I did ASUS update

No I don't have any additional hardware installed...

I can't attest to any other problems - only used the laptop 3 or 4 times -
and I don't play games - so not sure of the graphic card performance..
G75VW
It is less than a week old -

I have tons of ASUS stuff - including a P79X Pro MB and a few eeePC's
This is sad for me - tech support wants me to mail my laptop to them -
screw that -
they will just send me another one w/ same problem...

I have G75 (bestbuy model) I also experience this issue. It seems to happen intermittently. I get audio that randomly starts playing out of speakers whenever it decides to do so. To fix it I have to unplug the headset and replug them back in again.

Good new for me than, i have now gone thur it more than 10 times, and it is still ok.

May be i got a good one??????

dont be to sure about that bro, my g55 i tried to replicate the problem over 20 to 30 times but the sound doesnt comes out from the speakers when headphone attached..i was on cloud nine thinking that i got a good unit..all of a sudden, 3 days ago, the issue occured, i unplugged the hesdpones and attached them again and the sound from the subwoofer dissapear..then i tried to replicate again but didnt occur after that and since i updated my drivers..guess what im trying to tell it thats is occurs randomly due to driver issue..issue happened to me once and only once

I had a go at trying to replicate the isue. But mine appears to be working ok.

This is what i did.
Play song can hear thru all speakers.
Pluged in headphones, sound only thru headphones.
Put laptop to sleep
Woke it up started song again and sound only thru headphones.

If i mised something let me know and i will give it a go.

It is random problem - I can't find the exact pattern.

Another way I have seen this happen:

1.) put a DVD in - w/ headphones plugged in
2.)Watch DVD with windows media player
3.)pause DVD for 10-15 minutes
4.)hit play on windows media player (headphones still plugged in)
5.)audio comes out headphones as well as laptop speakers

i uninstalled the via drivers and let windows sort out its own drivers. this has completely solved this problem, however using the Fn+volume keys no longer change the volume when headphones are plugged in, only when on speakers.